From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B56B4C433B4 for ; Wed, 28 Apr 2021 06:08:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8E2E66141E for ; Wed, 28 Apr 2021 06:08:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235809AbhD1GJi (ORCPT ); Wed, 28 Apr 2021 02:09:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:52254 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229464AbhD1GJh (ORCPT ); Wed, 28 Apr 2021 02:09:37 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1619590133; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=r4ccoOewp0/tIZpyM3mtQqofDWqmLYaEGOxNl06vfDk=; b=YOruCeQV6mf++SPf7+LjnEs2Lum6aqTybVB2/xDLukp8QFAJJ16vLihxQdVYFB8EfMTnPQ TG/3xpD8YT1oz3Skj5nL0yV3TVo+au4qAyfGhkidGrPIbfZHcgbgZst+SZEhwpvyPniD4E N+o3ckuK5dicDA51d+w8MNS0G44Qj1o= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-525-CrTG2BfDMVegtf2qawGHug-1; Wed, 28 Apr 2021 02:08:49 -0400 X-MC-Unique: CrTG2BfDMVegtf2qawGHug-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2BEF6801AC1; Wed, 28 Apr 2021 06:08:48 +0000 (UTC) Received: from lxbceph1.gsslab.pek2.redhat.com (unknown [10.72.47.117]) by smtp.corp.redhat.com (Postfix) with ESMTP id 51CD96BC0C; Wed, 28 Apr 2021 06:08:46 +0000 (UTC) From: xiubli@redhat.com To: jlayton@kernel.org Cc: idryomov@gmail.com, pdonnell@redhat.com, ceph-devel@vger.kernel.org, Xiubo Li Subject: [PATCH v3 1/2] ceph: update and rename __update_latency helper to __update_stdev Date: Wed, 28 Apr 2021 14:08:39 +0800 Message-Id: <20210428060840.4447-2-xiubli@redhat.com> In-Reply-To: <20210428060840.4447-1-xiubli@redhat.com> References: <20210428060840.4447-1-xiubli@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org From: Xiubo Li The new __update_stdev() helper will only compute the standard deviation. URL: https://tracker.ceph.com/issues/49913 Signed-off-by: Xiubo Li --- fs/ceph/metric.c | 56 ++++++++++++++++++++++++++++++------------------ 1 file changed, 35 insertions(+), 21 deletions(-) diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c index 28b6b42ad677..c9a92fb8ebbf 100644 --- a/fs/ceph/metric.c +++ b/fs/ceph/metric.c @@ -285,19 +285,18 @@ void ceph_metric_destroy(struct ceph_client_metric *m) ceph_put_mds_session(m->session); } -static inline void __update_latency(ktime_t *totalp, ktime_t *lsump, - ktime_t *min, ktime_t *max, - ktime_t *sq_sump, ktime_t lat) -{ - ktime_t total, avg, sq, lsum; - - total = ++(*totalp); - lsum = (*lsump += lat); +#define METRIC_UPDATE_MIN_MAX(min, max, new) \ +{ \ + if (unlikely(new < min)) \ + min = new; \ + if (unlikely(new > max)) \ + max = new; \ +} - if (unlikely(lat < *min)) - *min = lat; - if (unlikely(lat > *max)) - *max = lat; +static inline void __update_stdev(ktime_t total, ktime_t lsum, + ktime_t *sq_sump, ktime_t lat) +{ + ktime_t avg, sq; if (unlikely(total == 1)) return; @@ -315,14 +314,19 @@ void ceph_update_read_metrics(struct ceph_client_metric *m, int rc) { ktime_t lat = ktime_sub(r_end, r_start); + ktime_t total; if (unlikely(rc < 0 && rc != -ENOENT && rc != -ETIMEDOUT)) return; spin_lock(&m->read_metric_lock); - __update_latency(&m->total_reads, &m->read_latency_sum, - &m->read_latency_min, &m->read_latency_max, - &m->read_latency_sq_sum, lat); + total = ++m->total_reads; + m->read_latency_sum += lat; + METRIC_UPDATE_MIN_MAX(m->read_latency_min, + m->read_latency_max, + lat); + __update_stdev(total, m->read_latency_sum, + &m->read_latency_sq_sum, lat); spin_unlock(&m->read_metric_lock); } @@ -331,14 +335,19 @@ void ceph_update_write_metrics(struct ceph_client_metric *m, int rc) { ktime_t lat = ktime_sub(r_end, r_start); + ktime_t total; if (unlikely(rc && rc != -ETIMEDOUT)) return; spin_lock(&m->write_metric_lock); - __update_latency(&m->total_writes, &m->write_latency_sum, - &m->write_latency_min, &m->write_latency_max, - &m->write_latency_sq_sum, lat); + total = ++m->total_writes; + m->write_latency_sum += lat; + METRIC_UPDATE_MIN_MAX(m->write_latency_min, + m->write_latency_max, + lat); + __update_stdev(total, m->write_latency_sum, + &m->write_latency_sq_sum, lat); spin_unlock(&m->write_metric_lock); } @@ -347,13 +356,18 @@ void ceph_update_metadata_metrics(struct ceph_client_metric *m, int rc) { ktime_t lat = ktime_sub(r_end, r_start); + ktime_t total; if (unlikely(rc && rc != -ENOENT)) return; spin_lock(&m->metadata_metric_lock); - __update_latency(&m->total_metadatas, &m->metadata_latency_sum, - &m->metadata_latency_min, &m->metadata_latency_max, - &m->metadata_latency_sq_sum, lat); + total = ++m->total_metadatas; + m->metadata_latency_sum += lat; + METRIC_UPDATE_MIN_MAX(m->metadata_latency_min, + m->metadata_latency_max, + lat); + __update_stdev(total, m->metadata_latency_sum, + &m->metadata_latency_sq_sum, lat); spin_unlock(&m->metadata_metric_lock); } -- 2.27.0